[CosmosDB] MongoDB API doesn't support creation of fixed collections

[MehaKaushik]

Resource Provider

Description of Feature or Work Requested
<Although the CosmosDB RP supports creation of fixed collections, CLI doesn't, which is an inconsistent behavior.>

Minimum API Version Required

Swagger Link

Target Date

[MehaKaushik]

Targeting S171

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc Kushagra Thapar (@kushagraThapar), Srinath Narayanan (@srinathnarayanan), Steve Faulkner (@southpolesteve), shurd, Matias Quaranta (@ealsur), Jake (@j82w), Andrew Feldman (@anfeldma-ms).

[yungezz]

set S171 milestone